chore: remove unused autoprefixer and postcss deps

Tailwind CSS v4 has built-in PostCSS integration and does not require
these as separate dependencies.

package-lock.json

@@ -1769,43 +1769,6 @@
         "node": ">=12"
       }
     },
-    "node_modules/autoprefixer": {
-      "version": "10.5.0",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.5.0.tgz",
-      "integrity": "sha512-FMhOoZV4+qR6aTUALKX2rEqGG+oyATvwBt9IIzVR5rMa2HRWPkxf+P+PAJLD1I/H5/II+HuZcBJYEFBpq39ong==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "opencollective",
-          "url": "https://opencollective.com/postcss/"
-        },
-        {
-          "type": "tidelift",
-          "url": "https://tidelift.com/funding/github/npm/autoprefixer"
-        },
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/ai"
-        }
-      ],
-      "license": "MIT",
-      "dependencies": {
-        "browserslist": "^4.28.2",
-        "caniuse-lite": "^1.0.30001787",
-        "fraction.js": "^5.3.4",
-        "picocolors": "^1.1.1",
-        "postcss-value-parser": "^4.2.0"
-      },
-      "bin": {
-        "autoprefixer": "bin/autoprefixer"
-      },
-      "engines": {
-        "node": "^10 || ^12 || >=14"
-      },
-      "peerDependencies": {
-        "postcss": "^8.1.0"
-      }
-    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -2573,20 +2536,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/fraction.js": {
-      "version": "5.3.4",
-      "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-5.3.4.tgz",
-      "integrity": "sha512-1X1NTtiJphryn/uLQz3whtY6jK3fTqoE3ohKs0tT+Ujr1W59oopxmoEh7Lu5p6vBaPbgoM0bzveAW4Qi5RyWDQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": "*"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/rawify"
-      }
-    },
     "node_modules/fresh": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/fresh/-/fresh-2.0.0.tgz",
@@ -3135,13 +3084,6 @@
         "node": "^10 || ^12 || >=14"
       }
     },
-    "node_modules/postcss-value-parser": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz",
-      "integrity": "sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/protobufjs": {
       "version": "7.5.5",
       "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.5.5.tgz",
@@ -4785,8 +4727,6 @@
         "@types/react": "^19.0.0",
         "@types/react-dom": "^19.0.0",
         "@vitejs/plugin-react": "^4.3.0",
-        "autoprefixer": "^10.4.0",
-        "postcss": "^8.4.0",
         "tailwindcss": "^4.0.0",
         "vite": "^6.0.0"
       }